Shield cutter

Abstract

The invention relates to a shield tool. The shield tool is mounted in a center area of a shield cutter disc, the shield tool comprises a cutter barrel, a plurality of cutter blades and a power structure; the multiple cutter blades surround the center of the cutter barrel and are evenly distributed and arranged on the surface of the cutter barrel, the cutter blades are fixedly arranged on the surface of the cutter barrel, and each cutter blade is in an arc-shaped piece body shape; and the power structure is connected with the cutter barrel in a driving mode and drives the cutter barrel to rotate. According to the shield tool, the multiple cutter blades are evenly distributed and arranged, the cutter blades conduct autorotating along with the cutter barrel under driving of the power structure, cut soil particles can be transported to the exterior of the center area of the cutter disc through rotating of the cutter blades, so that the effect of preventing the soil particles from settlingand solidifying into mud at the center of the cutter disc is achieved, and the problem that mud cake solidifying is prone to occurring in the center area of an existing rolling cutter is solved.

Description

Technical field [0001] The invention relates to the field of shield construction, in particular to a shield cutter. Background technique [0002] With the increasing population of large cities in my country and the increasing load of surface transportation facilities, the development and utilization of underground space has become the focus of attention of the majority of urban planners, and the shield construction method has also been widely adopted in urban rail transit projects. In shield construction in the Yangtze River Basin and the Pearl River Basin, argillaceous sandstone formation is one of the common geological crossings. In the construction of shield tunneling in this type of formation, due to the large diameter of the shield cutterhead, the small opening ratio, and the low linear velocity in the center area, the fine sand particles and debris cut by the cutterhead re-aggregate in the cutterhead cabin. The resulting semi-consolidated or consolidated block often covers...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a shield cutting tool, and solve the problem that the hob on the existing shield cutting head is prone to solidification of mud cake in the central area, which affects the construction of the mud-water shield.

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